What is 3FR?

Hasselblad 3FR is a medium-format camera raw format used by Hasselblad digital cameras, preserving complete sensor data for professional post-processing.

What is CPT?

Corel PHOTO-PAINT (CPT) is the native project format for Corel PHOTO-PAINT, preserving layers, masks, and editing history.

When Should You Use 3FR vs CPT?

3FR vs CPT: Key Differences

• •The core technical difference: 3FR relies on lossless compression whereas CPT uses lossless compression.
• •Neither format changes compression philosophy — both are lossless compression — so any size differences are due to encoding efficiency, not a shift in quality approach.
• •Transparency: Full transparency and alpha channels
• •3FR files are typically 40-80MB per image from medium-format sensors while CPT files range Large due to layer data
• •3FR is optimized for medium-format photography, professional studio while CPT is designed for corel image editing, photo manipulation — choose based on your specific workflow needs

Advantages of 3FR

• ✓3FR compresses data using lossless methods, keeping file sizes manageable for Medium-format photography, professional studio.
• ✓Industry-wide support means 3FR files open anywhere — from legacy systems to the latest devices.
• ✓Lossless quality makes 3FR the gold standard for archival and master copies.
• ✓From Adobe Photoshop to open-source alternatives, 3FR works out of the box.

Advantages of CPT

• ✓The lossless nature of CPT means file sizes stay reasonable while handling Corel image editing, photo manipulation efficiently.
• ✓From mobile devices to enterprise servers, CPT is recognized and supported everywhere.
• ✓The trade-off for CPT's perfection is larger files — but for archival work, it is worth every megabyte.
• ✓CPT is a first-class citizen in all major software ecosystems, from creative suites to development environments.

Common Use Cases for 3FR to CPT Conversion

• Presentation graphics
• Blog and article illustrations
• Mobile app UI assets
• Product photography for marketplaces
• Digital art portfolios
• Brochure and flyer design

Industry Applications

Best Practices for 3FR to CPT Conversion

• →When converting 3FR to CPT, check whether CPT supports transparency — if not, your transparent areas will be filled with a solid color
• →Use CPT for maximum quality archival and 3FR for lossless workflows
• →Optimize images for web to reduce page load times — tools like our converter let you adjust quality settings before conversion
• →Maintain original aspect ratio to avoid distortion during conversion
• →Always keep a backup of your original files before converting
• →Choose the appropriate quality settings for your specific use case

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Troubleshooting 3FR to CPT Conversion

• !CPT shows visible compression artifacts → lower the compression level or switch to a lossless variant
• !The converted CPT image looks washed out → the source 3FR likely uses a wider color space than CPT supports
• !CPT file is much larger than expected → check if the conversion preserved an unnecessarily high resolution
• !Text in the converted CPT looks fuzzy → text-heavy images benefit from higher quality settings or a different output format

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